. Give two differences between a zygote and a foetus.
i. It is the earliest stage of development
ii. It is formed by the fusion of male and female gametes
iii. It is a single cell
iv. The zygote divides several times to form an embryo
v. The zygote normally lasts a week and then develop into its next stage.
i. It is the last developmental stage of an organism
ii. The stage of the embryo that shows all the main recognizable body parts of a mature organism.
iii. The foetus stage occurs after the embryo stage.
iv. Foetus mainly undergoes internal development.